Application of Similar Material Simulation in Water Disaster Prevention in Ascending Mining

It is necessary to predict the development height of the water flowing fractured zone produced in the lower coal seam extraction in order to accurately confirm the main water filling source during the ascending mining. Based on the analysis of the hydro- geological conditions in the mine,the prediction was carried out on the development height of the water flowing fractured zone in the lower coal seam through the similar material simulation experiments,and analysis was made on the main water flooding threat in the lower coal seam according to the space relation of the coal seam and aquifer. The results showed that the water flowing fractured zone in the lower seam can only spread to its roof aquifer,the roof aquifer of the upper coal seam did not constitute water flooding threat to it,and based on this research result,corresponding measures for water flooding prevention and control were formulated. Through analysis,prediction was made on the development height of the water flowing fractured zone in the lower coal seam with the similar material simulation,and this result can be used as the basis for carrying out water flooding prevention and control work under the condition of ascending mining.